• Year
  • 1950
  • Category
  • Broadcast Receiver - or past WW2 Tuner
  • Radiomuseum.org ID
  • 230332

Click on the schematic thumbnail to request the schematic as a free document.

 Technical Specifications

  • Number of Tubes
  • 4
  • Main principle
  • Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s); Reflex
  • Tuned circuits
  • 6 AM circuit(s)
  • Wave bands
  • Broadcast and Short Wave (SW).
  • Power type and voltage
  • Alternating Current supply (AC) / 220; 240 Volt
  • Loudspeaker
  • Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 5 inch = 12.7 cm
  • Material
  • Bakelite or Plastics (type unknown)
  • from Radiomuseum.org
  • Model: 11-20J (Issue 2 - Kriesler Radio Company;
  • Shape
  • Tablemodel without push buttons, Mantel/Midget/Compact up to 14
  • Dimensions (WHD)
  • 308 x 225 x 222 mm / 12.1 x 8.9 x 8.7 inch
  • Notes
  • The 11-20 had 27 variants, differing in valve line up, speaker type, circuit variations etc.

    CIRCUIT: As for 11-20 Issue 2 except for the following alterations:-

    (a) 6BE6 Converter (7 pin miniature) replaces ECH35 (octal). (b) 10pf condenser (Part No. 13-43). in coil deleted. (c) 30K 1watt screen resistor (R8) deleted. (d) .05µf 400v condenser (Part No. 23-8) wired from 6G8G screen to earth. (e) 50K ½watt (R143B) grid leak deleted, replaced by 20K ½watt (Part No. 12-68). (f) 01µf 600v (C27) Audio coupling condenser deleted, replaced by.005µf 600v (Part No. 23-13) (g) 75K 1watt resistor (12-5) wire to 6G8G screen. (h) 30K 1watt resistor (Part No. 12-8) fitted from H.T. to 6BE6 screen. (i) 20Ω ½watt grid stopper (R157) deleted, replaced by 70Ω ½watt (Part No. 12-67. (j) 250pf oscillator coupling condenser (Part No. 13-44). (k) 3pf neutralising condenser (Part No. 13-52) fitted between control grid and oscillator grid 6BE6. (In circuit S/W only).

    Also mentioned in general notes that grid leak 6V6G is 300K, but think the 6V6G valve mentioned is a typo.

  • Literature/Schematics (2)
  • - - Manufacturers Literature (Kriesler Technical Service Instructions.)
  • Author
  • Model page created by Stuart Irwin. See "Data change" for further contributors.

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